scholarly journals Structural and statistical characterization of joints and multi-scale faults in an alternating sandstone and shale turbidite sequence at the Santa Susana Field Laboratory: Implications for their effects on groundwater flow and contaminant transport

2016 ◽  
Vol 85 ◽  
pp. 95-114 ◽  
Author(s):  
Antonino Cilona ◽  
Atilla Aydin ◽  
Jeremias Likerman ◽  
Beth Parker ◽  
John Cherry
Keyword(s):  
Groundwater Flow ◽  
Contaminant Transport ◽  
Statistical Characterization ◽  
Multi Scale ◽  
Field Laboratory

Downward seepage effects on dynamics of scour depth and migrating dune-like bedforms at tandem piers

2020 ◽  
Vol 47 (1) ◽  
pp. 13-24
Author(s):  
Rutuja Chavan ◽  
Bimlesh Kumar
Keyword(s):  
Experimental Approach ◽  
Scour Depth ◽  
Statistical Characterization ◽  
Multi Scale ◽  
Bed Elevation ◽  
Downward Seepage ◽  
Alluvial Channel ◽  
Reversal Flow ◽  
Erosive Capacity

The present study focuses on multi-scale statistical characterization of scour depth at tandem piers and migrating dune-like bedforms forming behind the piers in downward seepage affected alluvial channel, using an experimental approach. Experiments were conducted using two circular piers arranged in a tandem manner for no seepage, 10% seepage, and 15% seepage condition. The erosive capacity of reversal flow is hindered with downward seepage, which results in reducing velocity and Reynolds stress near the bed at upstream of piers in case of seepage runs. The bed elevation of the scoured region is decreasing with the increasing seepage percentage and the growth in scour depth is diminishing with time. The celerity of scour depth is decreasing with time as well as decreasing with increasing downward seepage. Probability density function of bedform elevation has positive tail slightly thicker than the Gaussian.

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